Microwave absorption properties and infrared emissivities of ordered mesoporous C-TiO2 nanocomposites with crystalline framework

被引：57
作者：
Wang, Tao [1 ]
He, Jianping [1 ]
Zhou, Jianhua [1 ]
Tang, Jing [1 ]
Guo, Yunxia [1 ]
Ding, Xiaochun [1 ]
Wu, Shichao [1 ]
Zhao, Jianqing [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Nanjing 210016, Peoples R China
来源：
JOURNAL OF SOLID STATE CHEMISTRY | 2010年 / 183卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Mesoporous nanocomposite; Solvent-evaporation induced self-assembly; Microwave absorption; Infrared emissivity; ELECTROMAGNETIC-WAVE ABSORPTION; COMPLEX PERMITTIVITY; ASSISTED SYNTHESIS; CARBON; COMPOSITES; NANOPARTICLES; PERMEABILITY; SURFACTANT; ABSORBERS; DESIGN;
D O I：
10.1016/j.jssc.2010.09.028
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Ordered mesoporous C-TiO2 nanocomposites with crystalline framework were prepared by the evaporation-induced triconstituent co-assembly method. The products were characterized by XRD, TEM, N-2 adsorption-desorption and TG. Their microwave absorption properties were investigated by mixing the product and epoxy resin. It is found that the peak with minimum reflection loss value moves to lower frequencies and the ordered mesoporous C-TiO2 nanocomposite possesses an excellent microwave absorbing property with the maximum reflection loss of -25.4 dB and the bandwidth lower than -10 dB is 6.6 GHz. The attenuation of microwave can be attributed to dielectric loss and their absorption mechanism is discussed in detail. The mesoporous C-TiO2 nanocomposites also exhibit a lower infrared emissivity in the wavelength from 8 to 14 mu m than that of TiO2-free powder. (C) 2010 Elsevier Inc. All rights reserved.
引用
收藏
页码：2797 / 2804
页数：8
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